8th Class Mathematics Comparing Quantities Question Bank Comparing Quantities

  • question_answer
    Select the INCORRECT match.

    A)
    Principal (in Rs.) Rate % (p.a) Time (in years) C.I. (in Rs.)
     1000 5% 3 157.63
                   

    B)
    Principal (in Rs.) Rate % (p.a) Time (in years) C.I. (in Rs.)
     360 20% 2 158.40
                   

    C)
    Principal (in Rs.) Rate % (p.a) Time (in years) C.I. (in Rs.)
     3000 10% 3 939
                   

    D)
    Principal (in Rs.) Rate % (p.a) Time (in years) C.I. (in Rs.)
     72000 6% 3 13753.15

    Correct Answer: C

    Solution :

              Principal \[\text{= Rs}\text{. 3000}\] Rate = 10%, Time = 3 years \[\text{A=P}\times {{\left( 1+\frac{R}{100} \right)}^{n}}=3000{{\left( 1+\frac{10}{1000} \right)}^{3}}=Rs.3993\] C.I. \[\text{=Rs}\text{. (3993-3000)=Rs}\text{. 993}\]


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